<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        padding: 0;
        margin: 0;
      }
      .container {
        width: 100%;
        height: 100vh;
        display: flex;
        /* background-color: blue; */
      }
      .left {
        width: 210px;
        background-color: red;
      }
      .right {
        flex: 1;
        display: flex;
        flex-direction: column;
      }
      .right .nav,
      .right .tag {
        height: 50px;
      }

      .right .nav {
        background-color: aqua;
      }
      .right .tag {
        background-color: blueviolet;
      }

      .right .content {
        background-color: brown;
        /* min-height: calc(100vh - 100px); */
        flex: 1;
      }
    </style>
  </head>
  <body>
    <div class="container">
      <div class="left">left</div>
      <div class="right">
        <div class="nav">111</div>
        <div class="tag">2222</div>
        <div class="content">content</div>
      </div>
    </div>
  </body>
</html>
